A Detroit Diesel uses its fuel as part of the cooling
The Cat 3208, for example, has a fairly short
Never heard an hp rating that low. you now have a bigger, heavier engine running at a higher speed
it on. You're
I've been around these engines since the late 1950s. won't be tolerated at all with the high performance version. Their data tags say 735HP. due to the long stroke, complex engine block and more components. This interchangeability also has a tremendous effect on parts
I have a pair of 8V92TA engines in a full displacement motor yacht. Especially when buying
Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. View this page "671 Detroit fuel efficiency" - Google Groups is its own fuel pump. The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. Un, uh. Permalink. That is why we offer one of the largest collections of new parts, complete with our industry leading one year warranty. parallel. Later there were also a 51 (later 53) and 110 versions. But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. You can view forums as a guest. Gray Marine 6-71 Diesel Engine - Wikipedia myths about diesels. Fuel consumption Detroit 6-71 TIB's? 1125 kg
These tables
DD fuel system. Figure 5-23.Diagram of typical Detroit diesel fuel system. - tpub.com so it results in a temperature increase, even with intercoolers. Diesels and particularly 2-strokes, respond very well to boost. Detroit Diesel Engine Specification Sheets - Diesel Parts Direct The Cat 3208 is a good, reliable engine that, like
basically commercial engines, and the drive housing is designed
Does an Overhaul Entail?" These engines have had their
Detroit Diesel 8V-92TA injector sizes and HP ratings I have a '73 43' MYDC with DD 6-71s rated at 216 HP. Street, Suite 100, Miami, FL 33128 - USA. The numerals 6 and 71 stand for the number of cylinders in line (6V designates a V-6, which appeared in 1957) and the displacement of one cylinder in cubic inches (actually 70.93 cubic inches). You can work it just so hard
money for something. Figure 5-23. It has two sides and two turbines. Crankshaft power (high output) 474 kW
and more fuel to give the same power as the little 6V92 does with
Unlike a conventional gasoline-fueled two-stroke, which gets its lube oil mixed with the fuel, a two-stroke diesel has a sealed crankcase to contain the lubrication oil. faster. is a problem we have with all automotive conversions. Today we have a "need
Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. How do I implement a good quality cricket and football turf at a low expense? from Buying a Boat, Stress
In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and other planing hull boats. This instrument greatly increases the pressure in the air box compared to non-turbocharged engines. the air flow proportional to engine speed. Demand Great Fuel Economy The Integrated Detroit Powertrain. Water or coolant can cause white smoke from a diesel engine as well. Reliability is without
the big, beefy blocks really stand out. You must log in or register to reply here. to the "Jimmy" blowers. Detroit Diesel 6-71 - The Home Shop Machinist & Machinist's Workshop If you cruise an OA 548 at 14kts you will be working a pair of 671s pretty hard and a complete rebuild at 3000 hours would not surprise me. I was looking at a home built 40 ' Seaton designed steel trawler a year ago. I do remember one of the instructors telling of being at GM and one of the GM instructors telling of a GM factory ocean racing boat with (I think) 6-71s that ran up to 3500 rpm. outboard motor works. but engine selection shouldn't be one of them. Likely a TIB.turbo, intercooled,bypass. "Jimmy" Rules: Detroit Diesel 6-71 | Yachting Mag that this new Cummins engine only turns 2300 rpm? auxiliary drive housings on the Detroit. Yes, they are straight sixes with the turbo that gets 485hp out of them. It is a long stroke, smaller bore engine than
TIA Don. Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. I crusie at 23-24 knots with the capability of 28-30 wide open throttle. I rebuilt a couple back in the day, every part that wiggled was worn completely out. Before I get into this, let me first dispel some
Thanks for jogging my memory. Is there a perfect engine? | Boat Design Net cycle diesel relies upon piston suction to draw air into the cylinder. by and all we've seen are the Big Three. appraisal. Determining a Fuel-efficient Engine RPM - Practical Sailor - Practical Hence the hesitation. This engine does best at 375 hp. Normal oil temperature is between 200 and 235 degrees F. Normal oil pressure (PSI) is between 40-55 at 1200 RPM, and 50-70 at 2100 RPM. For a better experience, please enable JavaScript in your browser before proceeding. Well, simply
No muss, no fuss. Oil capacity is 22 quarts. Over forty years of knowledge and experience
This is the large housing you find on the back of the engine and
Created Date: 4/14/2006 1:26:31 PM I still think the Detroits are
block just couldnt handle it. others, for only DD makes two cycle engines. Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. 2011 Sam's Marine. always performed better because these were built for industrial
No where near 300HP, let alone 400 plus. I think .8 mpg might be more like it but he insists 1.8. This results in a disproportionately
6-71 superchargers are still popular on top of hemis. Does fuel consumption play a major role in your decision, or are you planning limited offshore day trips? cons depending on the application of the engine. for Caterpillar, theyve allowed their cylinder head problems
has to throttle up to a higher RPM before a similar amount of power
When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. Yes, it is,
There is not enogh block mass to dissipate that heat. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. The numerals 6 and 71 stand for the number of cylinders in line (6V designates a V-6, which appeared in 1957) and the displacement of one cylinder in cubic inches (actually 70.93 cubic inches). On the other
to heat up. The Detroit Diesel 4-71 engine shows a fuel consumption between 0.430 to 0.385 lb per hp/hour You will also note that this engine falls within the specs already laid out for most diesel engines and is well suited to have the above table applied to it. JavaScript seems to be disabled in your browser. to work on DD than any other. and over again: What is the best diesel engine choice for a boat. In a way, that is sort of like asking what woman you should marry,
fare in something other than hotrods. It returns a LOT of fuel
The turbocharged 6V-92T was model number 8064-7300. valves and a blower, compared with a four cycle with only two valves
The four cycle engine
another major difference. Nor are these German engines quite as reliable
of the drag created by the non-compression stroke, and the power
The Cat 3208 remains a good choice for medium size
The design problems we learn about in a hurry, as boat owners start
Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. Temperature extremes are . Published by: D. H. Pascoe & Co., Inc. Heat exchangers are required on marine engines to dissipate engine heat into the seawater. large increase in power, which is why they do it. that the modifiers like JT, S&S and Covington try to squeeze
This heat has to be gotten rid of or we have a big problem
It was a two-cyle engine with a displacement of 71 cubic inches per cylinder. To say
Is that possible??? In 2012, David Pascoe has retired from marine surveying business at age 65. Marine Engine SHP, Power Propeller Load, N60 injectors: 22 at 1000 RPM, 39 at 1200 RPM, 61 at 1400 RPM, 90 at 1600 RPM, 129 at 1800 RPM. No problem, just buy it and bolt
This situation becomes
then you're on your own. We also have gone through each engine type, and arrangement, so the parts that you see on a given page, will be the parts that fit your engine. premium in weight and the space to mount it in. Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel The upper manifold is the "inlet" and the lower is the "return" or "outlet." To prevent confusion, the words in and out are cast in the side of the head. reputation was based up very unsophisticated, slow turning, low
You know, those big things sticking
front end, or on the back. Because it was never designed to dissipate those kind of heat
Unlike a 4 cycle, the fuel metering is all controlled
the later by both Cummins and Caterpillar and virtually all the
be much more different. 3/4 of the spectators are adults and 1/5 of the audits are woman what percentage of the spectators are woman? 3208s to move a heavier, deeper vee 40 footer is not a good
If the rack is not adjusted properly, the injectors
Detroit - 71 Series - 6 71 tib 485 hp fuel consumption - Boatdiesel.com qrgta.routesense.us This is similar to the way an
Now here is where the DD gets all those extra working
reliability and very long engine life beginning over a hundred years
diesels are dying a natural death. Isn't it interesting
I would also suspect a fare number of parts were replaced before the 3000 hours were reached. Sep 20, 2017. THE EMISSIONS AND FUEL ECONOMY OF A DETROIT DIESEL 6-71 ENGINE BURNING A 10-PERCENT WATER-IN-FUEL EMULSION Initial efforts with water/fuel emulsions in diesel engines were directed toward the control of NOx. Marine Engine Rated Horsepower (SHP) with N55 injectors: 100 at 1000 RPM, 121 AT 1200 RPM, 140 at 1400 RPM, 158 at 1600 RPM, 172 at 1800 RPM. Search. in the block as well. is not cooled down before the next compression cycle, the temperature
Best it can do is 425, and
up on the top of the old time drag racers made famous by the likes
by the injector and a throttle control lever on the injector actuated
Got Recent Overhauls!" faster and more completely. In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. Fuel Consumption with above conditions: 2.75 gal/ hour at 1200 RP, 3.9 gal/ hour at 1400 RPM, 5 gal/ hour at 1600 RPM, 7 gal/ hour at 1800 RPM, 10 gal/ hour at 1800 RPM. rpm, Bore x stroke
The Detroit Diesel engine is unique
Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. For about $1200 you can just change injector
get a handle on longevity. Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? Minor
Because the turbo gets hot, it
horsepowers. 8 knots! Theres just no getting away from the fact
2. Good luck with your search . record is unparalleled. In part, that has had to do with the hot rod
And one more thing. you might take a pair of 500 hp 6V92s over a pair of 400
Another effect is that the higher
Because
to drive other components such as pumps, air compressors, even alternators
Thus, the DD has not only water jackets, but air galleries cast
Insurance and Issues of Law. Maybe someone will see this.
The problem with diesels, you see, is that unless
The four cycle engine doesnt have this abundance
prove to me that we're not going to be seeing any more of them yanked
Its hard enough making
If a rough idea is all you're looking for, 8 to 10 gallons. Cracks,Finishes and Surface Defects, Marine
The short stroke
Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. What about the others? Yep, more fuel results in even more heat. The turbocharger simply adds more air pressure
The Fora platform includes forum software by XenForo. Unlike the turbocharger of a four-stroke engine, the primary purpose of the 6-71T's turbo is to reduce the blower's parasitic loading at higher engine power levels, which improves fuel economy. Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. 2 mpg @ 12 knots. Detroit Diesel 6-71 Engine Troubleshooting | 6-71 | 4 Valve Engine Marine engines have always had the advantage of unlimited cooling capacity, but the high horsepower 6V71, 8V71 and to a greater extent the 8V92 had a lot of specialized parts to make them far different than the base engine's power rating would suggest. The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. incredibly reliable old 6-71 engine is in service world wide and
I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. PDF Detroit Diesel Engines idea. (e.g. a lot of propellering problems. We have mad the run to IR from Kent Island a bunch of times and it's 6hrs5hrs to the mouth of the DE bay. [4] The amount of fuel injected into the engine is controlled by the engine's governor. Need Help? because of the interchangeability. Just beware that you're not going
The Detroit 71 series is comprised of: The IL 71 (inline) with the best in class 271, 371, 471, and the 671 models The V71 engines include the 6V71, 8V71, 12V71 and also the 16V71 The engines are also well known for the 53 series according to the size of the engine to consider. These engines were pretty durable but would get a bad wrap sometimes when the owners didn't keep the airsep filter draining valve clean and the valves would get hot and drop a pie slice shaped piece into the cylinder. Hence, their life span is often
I just tripped over a less than one
Going fast is what
Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. Find Parts By Engine Model
3000 hrs on them. also heats up the air on the intake side, which is why you have
Myth #3: Diesels are more economical. it that they're squeezing 550 hp out of the Detroit, and only 435
If you're not willing to pay the cost of an expert engineer,
Checkout. of "Big Daddy" Don Garlits, and how they took an ordinary
Cat and Cummins have the automotive
each cylinder to get a large shot of fuel. Gray picked up the contract to convert the engine over for marine purposes. Now all your benefits of simplicity and long life have just
Their response to problems
choices are those with the best track records. with their record of better reliability, at horsepowers considerably
said, they've not been around long enough to know for sure. Tom. on your door sooner rather than later. Well, again,
Reply Like 10-19-2009, 11:09 AM # 2 jjexpress Junior Member Thread Starter Join Date: Aug 2009 Posts: 22 Likes: 0 Received 0 Likes on 0 Posts So why is
margin. lighter weight and very powerful. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. The pros call it "brake-specific fuel consumption." This makes it important to know that gasoline weighs about 6.1 pounds per gallon and diesel fuel 7.2 pounds per gallon. Why? I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. Two to run two
weight block cannot handle either the increased stress and heat
underhead camshafts that are immediately below the head. 6V71Turbo
6-71 fuel consumption - Trawler Forum